International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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Chloride Diffusion in Mortars - Effect of the Use of Limestone Sand Part II: Immersion Test

  • Akrout, Khaoula (Civil Engineering Laboratory, National Engineering School of Tunis) ;
  • Ltifi, Mounir (Civil Engineering Laboratory, National Engineering School of Tunis) ;
  • Ouezdou, Mongi Ben (Civil Engineering Laboratory, National Engineering School of Tunis)
  • Received : 2010.06.11
  • Accepted : 2010.12.09
  • Published : 2010.12.31
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Abstract

Part I of this study was devoted to the electrical accelerated chloride diffusion in mortars. In this second part, natural chloride diffusion has been investigated for four types of mortars under exposure to a 0.5 mol/L NaCl solution for a period of up to 35 days. Two different types of sand were used for the production of test samples: siliceous sand (used as a reference) and limestone sand (used in this study). The effect of water to cement ratio and exposure time on the diffusion coefficients of mortars was also investigated. In this study, the total and free chloride content and penetration depth of mortar were measured after immersion, and Fick's second law of diffusion was fitted to the experimental data to determine the diffusion coefficient. Their results show that the use of crushed limestone sand in mortar had a positive effect on the chloride resistance. The apparent diffusion coefficient in all specimens was smaller than that in siliceous sand mortar. However, the chloride penetration of these mortars was increased as exposure time progressed.

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References

  1. Akrout, K., Ltifi, M., Belhadj, A.N., and Ben Jamaa, N., “Comparative Study between Siliceous and Crushed Limestone Concrete Sands,” First Euro Mediterranean Symposium in Advances on Geomaterials and Structures, AGS'06, Hammamet Tunisia, 2006, pp. 579-584.
  2. Rmili, A., Ben Ouezdou, M., Added, M., and Ghorbel, E., “Incorporation of Crushed Sands and Tunisian Desert Sands in the Composition of Self Compacting Concretes. Part I: Study of Formulation,” International Journal of Concrete Structures and Materials, Vol. 3, No. 1, 2009, pp. 3-9. https://doi.org/10.4334/IJCSM.2009.3.1.003
  3. Akrout, K., Ltifi, M., Bonnet, S., Choinska, M., and Ben Ouezdou, M., “Effects of Limestone Sand on Transport Properties of Concrete,” RILEM TC 211-PAE- Concrete in Aggressive Aqueous Environments, Performance, Testing and Modeling, Toulouse, France, 2009.
  4. Akrout, K., Ltifi, M., Ben Ouezdou, M., and Ben Brahim, A., “Using Limestone Aggregates for Enhancing Resistance of Mortar to Chloride Attack-Durability,” Second Euro Mediterranean Symposium in Advances in Geomaterials and Structures, AGS2008, Hammamet, Tunisia, 2008, pp. 431-436.
  5. Shamsad, A., “Reinforcement Corrosion in Concrete Structures, Its Monitoring and Service Life Prediction-a Review,” Cement and Concrete Composite, Vol. 25, Nos. 4-5, 2003, pp. 459-471. https://doi.org/10.1016/S0958-9465(02)00086-0
  6. Erdogdu, S., Kondratova, I. L., and Bremner, T. W., “Determination of Chloride Diffusion Coefficient of Concrete Using Open-Circuit Potential Measurements,” Cement and Concrete Research, Vol. 34, No. 4, 2004, pp. 603-609. https://doi.org/10.1016/j.cemconres.2003.09.024
  7. AFREM-AFPC, “Methodes Recommandees Pour la Mesure des Grandeurs Associees la Durabilit,” Compte Rendu des Journees Techniques AFPC-AFREM, Toulouse 1997 (in French).
  8. Akrout, K., Ltifi, M., and Ben Ouezdou, M., “Chloride Diffusion in Mortar - Effect of Limestone Sand and Workability Part I: Migration Test,” International Journal of Concrete Structures and Materials, Vol. 4, No. 2, 2010.
  9. Cerny, R., Pavlyk, Z., and Rovnanykova, P., “Experimental Analysis of Coupled Water and Chloride Transport in Cement Mortar,” Cement and Concrete Composites, Vol. 26, No. 6, 2004, pp. 705-715. https://doi.org/10.1016/S0958-9465(03)00102-1
  10. Zhang, J. and Lounis, Z., “Sensitivity Analysis of Simplified Diffusion-Based Corrosion Initiation Model of Concrete Structures Exposed to Chlorides,” Cement and Concrete Research, Vol. 36, No. 7, 2006, pp. 1312-1323. https://doi.org/10.1016/j.cemconres.2006.01.015
  11. Thomas, M. D. A. and Bamforth, Phil B., “Modelling Chloride Diffusion in Concrete Effect of Fly Ash and Slag,” Cement and Concrete Research, Vol. 29, No. 4, 1999, pp. 487-495. https://doi.org/10.1016/S0008-8846(98)00192-6
  12. Almusallam, A. A., Khan, F. M., Dulaijan, S. U., and Al.Amoudi, O. S. B., “Effectiveness of Surface Coatings in Improving Concrete Durability,” Cement and Concrete Composites, Vol. 25, Nos. 4-5, 2003, pp. 473-481. https://doi.org/10.1016/S0958-9465(02)00087-2
  13. Zhang, J. Z., McLaughlin, I. M., and Buenfeld, N. R., “Modelling of Chloride Diffusion into Surface-Treated Concrete,” Cement and Concrete Composites, Vol. 20, No. 4, 1998, pp. 253-261. https://doi.org/10.1016/S0958-9465(98)00003-1
  14. Crank, The Mathematics of Diffusion, 2nd Ed., Clarendon Press, Oxford, 1975.

Cited by

  1. Time-Dependent Diffusion Modeling of Concrete with Cement Containing Limestone and Inorganic Process Additions vol.113, pp.6, 2016, https://doi.org/10.14359/51689243